Synthesis and electrochemical studies of nanostructured metal oxides for lithium ion batteries

The key to optimize lithium ion batteries (LIBs) for future advanced application is to develop novel electrode materials with outstanding electrochemical properties. Nanomaterials with precisely designed configurations provide one of the most desirable ways. As one of the most studied candidates, me...

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Main Author: Li, Linlin
Other Authors: Srinivasan Madhavi
Format: Theses and Dissertations
Language:English
Published: 2016
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Online Access:https://hdl.handle.net/10356/65969
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-659692023-03-04T16:36:58Z Synthesis and electrochemical studies of nanostructured metal oxides for lithium ion batteries Li, Linlin Srinivasan Madhavi School of Materials Science & Engineering DRNTU::Engineering::Materials The key to optimize lithium ion batteries (LIBs) for future advanced application is to develop novel electrode materials with outstanding electrochemical properties. Nanomaterials with precisely designed configurations provide one of the most desirable ways. As one of the most studied candidates, metal oxides, especially Sn-based and Co-based oxides, are currently extensively exploited as anode for LIBs. Nevertheless, several issues need to be addressed that handicap the commercial application of these metal oxides. So, scientific research and breakthroughs are imperative to meet the requirements for real use. With this in view, a series of one-dimensional (1D) Sn-based (ASnO3) and Co-based (ACo2O4) ternary oxides with various nanoarchitectures has been prepared by simple and versatile electrospinning techniques. In this thesis, one major aim is to investigate the effect of different nanostructures on the electrochemical performance of LIBs. Meanwhile, the possible formation mechanism for the unique structure will be studied to shed some light on the controllable fabrication of other metal oxides with similar morphology. Benefiting from their unique structural features, eggroll-like CaSnO3 nanotubes (CSO-NT), hierarchical CaCo2O4 nanofibes (CCO-NF), and porous NiCo2O4 nanotubes (NCO-NT) demonstrate superior electrochemical performance compared to their corresponding counter-parts, respectively. To gain deep understanding on the enhanced batteries performance, by comparing the lithium storage capability of as-prepared different nanostructures, the effect of counter ions substitution, especially A-site substitution, in ASnO3 and ACo2O4 systems has been systematically discussed. By virtue of excellent properties of the active matrix elements Ni, porous NCO-NT with large capacity and remarkable cycling stability is identified as the most potential anode materials for LIBs. As the electrochemical reaction mechanisms and capacity degradation is critical for the rational design of advanced LIBs, this thesis performed fundamental investigation for the structure evolution of eggroll-like CSO-NT, hierarchical CCO-NF, and porous NCO-NT. The origin of the capacity degradation and lithium storage mechanisms have been proposed and discussed. Moreover, the reaction kinetics and lithium diffusion coefficients were also analyzed in depth. Lastly, it is hoped that all of studies could shed more light on the fundamental science. DOCTOR OF PHILOSOPHY (MSE) 2016-02-10T03:00:30Z 2016-02-10T03:00:30Z 2016 Thesis Li, L. (2016). Synthesis and electrochemical studies of nanostructured metal oxides for lithium ion batteries. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/65969 10.32657/10356/65969 en 179 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials
spellingShingle DRNTU::Engineering::Materials
Li, Linlin
Synthesis and electrochemical studies of nanostructured metal oxides for lithium ion batteries
description The key to optimize lithium ion batteries (LIBs) for future advanced application is to develop novel electrode materials with outstanding electrochemical properties. Nanomaterials with precisely designed configurations provide one of the most desirable ways. As one of the most studied candidates, metal oxides, especially Sn-based and Co-based oxides, are currently extensively exploited as anode for LIBs. Nevertheless, several issues need to be addressed that handicap the commercial application of these metal oxides. So, scientific research and breakthroughs are imperative to meet the requirements for real use. With this in view, a series of one-dimensional (1D) Sn-based (ASnO3) and Co-based (ACo2O4) ternary oxides with various nanoarchitectures has been prepared by simple and versatile electrospinning techniques. In this thesis, one major aim is to investigate the effect of different nanostructures on the electrochemical performance of LIBs. Meanwhile, the possible formation mechanism for the unique structure will be studied to shed some light on the controllable fabrication of other metal oxides with similar morphology. Benefiting from their unique structural features, eggroll-like CaSnO3 nanotubes (CSO-NT), hierarchical CaCo2O4 nanofibes (CCO-NF), and porous NiCo2O4 nanotubes (NCO-NT) demonstrate superior electrochemical performance compared to their corresponding counter-parts, respectively. To gain deep understanding on the enhanced batteries performance, by comparing the lithium storage capability of as-prepared different nanostructures, the effect of counter ions substitution, especially A-site substitution, in ASnO3 and ACo2O4 systems has been systematically discussed. By virtue of excellent properties of the active matrix elements Ni, porous NCO-NT with large capacity and remarkable cycling stability is identified as the most potential anode materials for LIBs. As the electrochemical reaction mechanisms and capacity degradation is critical for the rational design of advanced LIBs, this thesis performed fundamental investigation for the structure evolution of eggroll-like CSO-NT, hierarchical CCO-NF, and porous NCO-NT. The origin of the capacity degradation and lithium storage mechanisms have been proposed and discussed. Moreover, the reaction kinetics and lithium diffusion coefficients were also analyzed in depth. Lastly, it is hoped that all of studies could shed more light on the fundamental science.
author2 Srinivasan Madhavi
author_facet Srinivasan Madhavi
Li, Linlin
format Theses and Dissertations
author Li, Linlin
author_sort Li, Linlin
title Synthesis and electrochemical studies of nanostructured metal oxides for lithium ion batteries
title_short Synthesis and electrochemical studies of nanostructured metal oxides for lithium ion batteries
title_full Synthesis and electrochemical studies of nanostructured metal oxides for lithium ion batteries
title_fullStr Synthesis and electrochemical studies of nanostructured metal oxides for lithium ion batteries
title_full_unstemmed Synthesis and electrochemical studies of nanostructured metal oxides for lithium ion batteries
title_sort synthesis and electrochemical studies of nanostructured metal oxides for lithium ion batteries
publishDate 2016
url https://hdl.handle.net/10356/65969
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